Promotion-chasing Derby County suffered back-to-back league defeats for the first time this season as second half goals from substitutes Dale Stephens and Kazenga LuaLua gave Brighton a 2-0 victory before a crowd of 23,665 at the Amex Stadium.

The injury-hit Rams should have been ahead before Stephens struck on 70 minutes and LuaLua gave the Seagulls their fourth win in the last five home games seven minutes later.

Derby came close to breaking the deadlock in only the fifth minute when a 20-yard shot...